On 10/13/20, Tony Flury via Python-list <python-list@python.org> wrote:
> I am trying to write a simple expression to build a raw string that ends
> in a single backslash. My understanding is that a raw string should
> ignore attempts at escaping characters but I get this :
>
> >>> a = r'end\'
> File "<stdin>", line 1
> a = r'end\'
> ^
> SyntaxError: EOL while scanning string literal
Since r'\'' represents a two-character string with a backslash and a
single quote, ending a raw string literal with an odd number of
backslashes requires adding the final backslash using implicit
string-literal concatenation. For example:
>>> r'some\raw\string''\\'
'some\\raw\\string\\'
Other ways to get the same result may operate at runtime instead of at
compile time.
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